Machine for feeding and packing pulverulent material



Feb. 22,1927.

' E. A. MARSH MACHINE FOR FEEDING AND PACKING PULVERULENT MATERIAL 2 Sheets-Sheet 1 Filed May 14, 1925 1 1,618,4 9 Feb. 22,1927. a A. MARSH 5.

MACHINE FOR FEEDING AND PACKING PuLvERuLnN'r MATERIAL Filed May 14. 1925 2 Sheets-Sheet 2' Patented Feb. 22, 1927.

UNITED STATES j f f g am PAfriarr OFFICE.

ESLI A. MARSH, OF CHICAGO, ILLINOIS, ASSIGNOR TO 5.11:". ELAM SALES SERVICE, INC., OF CI IICAGO, ILLINOIS, A CORPORATIQN OF ILLINOIS.

MACHINE FOR FEEDING AND PACKING PU v'nRULnNT MATERIAL.

Application filed May 14, 1525. sria ive. 30,255.

The machine of the present invention is intended as an'embodiment. in improved and developed form. of the packer barsshown and described in my Patent No. 1.487.683, issued March 18, 1924. Thispatent shows and describesthe use of stepped packer bars which are designed to act in conjunction with one another in thefeeding and packing of flour or other semi-free flowing material which necessitates the use of some form of mechanical agitatingandpacking means in order to causea freeand-uniform flow of the material from a'bin or receptacle mtothe bags or packages located 1I1 pOS1 of operation to those described in the above mentioned patent, but differing somewhat in form in order to more perfectly effect the 1 objects in view; and the present invention further relates to the embodiment of such;

improved packer bars in'a complete machine so designed and constructed as to meet the requirements of rapid, certain and uniform operation in the delivery of suchmaterials as flour or the like into bags or packages.

Further objects and purposes of the invention will appear from a detailed description thereof with re .erence to the accompanying. drawings, wherein machine;

Fig. 2 1s a side elevation thereof;

Fig. 3 is a detail of the cranked driving.

shaft for therpacker barsp' r Fig. 4 is a sectional elevation taken through the center of the machine; 7 Fig. 5 is a perspective view of one of the improved packer bars of the presentginvention; and g v Fig. 6 is a sectional detail of the spout and packer bars." I V The machine as a whole consists of side standards lOwhich are mounted upon a base 11 and extend upwardly tosuch height as to afford a suitable support for the feeding and iiacking mechanisms within convenient reach of the operator. V v The standards afford a'mounting'for a discharge chute 12 leading from a bin or conveyor 13 located behindsthe standards, discharge chntes' exte'nding forwardly Figure l'is a front elevation of the'entire" and downwardly and connecting with an elbow 1 1 which discharges into a funnel15.

which funnel. at its lower or diminished end, connects with a rectangular feed spout I flour or other similar material.

The elbow, as shown, is connected with the lower end of the chute in such a way as to divert the pulverulent material from an oblique downflow to avertical downflow intoand through the spout which directly coacts with the bags orreceptacles, which are preferablyof rectangular formation to fit snugly around the exterior wall of the spout, which spout, while the bag is being-filled,. enters directly into the mouththereof, as indicated by dotted lines in. Fig. 4.

The upper wall of the elbow 14: is perforated with a pair of guide sleeves or bosses 1 11751 through which 'areentered ajpair of rec procating plunger-rods 18. to which are pivotedv a pair of connecting rods 19 which engage with cranks 20 on anoverhead driving shaft 21 which is carried by ournal boxes 22 which are Secured to the standards lOrnear their upper ends. A pulley 23,act-

ing through the medium of a clutch 24.

16. Y The. arrangement of" the chute, elbow serves to" impart rotation to the driving shaft, which rotationcauses a reciprocation of the plunger rods 18. r

Each of the plunger rods 18 has secured to its lower end a packer 25, which packers, in conjunction with one another, afford the active elements for feeding down and packing the-pulverulent material in general c011- form'ity with the principle of operation set forth in my Patent No. 1,487,683.

Eachpacker comprises a vertically elongated bar 26,. the backs of which restin flatwise contact with the adjacent fiat front and rearwalls of the chute 16, which 011mg as stated, is of rectangular oblong formation with its major dimension in'transverse're lation to the machine. v

Each bar 26 is provided" throughoutits lower portion with a plurality of packer teeth 27 located in spaced relation to one another, each tooth being of wedge shaped formation and of transverse dimensions reater than the width of the packer bar.

The rear Willi of each tooth. lies witbi'ittba' than plane of the rear face of the her 226, as indie: ted in l ipj. ti so that the rear or non acting eurfaec of each pitcher will lie in close contact with the adjacent; front or rear wall of the chute, and the individual packer teeth are of t'ansverse diniensiuns snhstantially equal to the width of the chute so that the side faces 22B of the teeth will shut against the proximate side wallsol the chute and in position to carry down the pulverulent material tending to peel: against such side 'alls.

The pitcher teeth helm: of greater width the her .26 will aiil'ord outstauiding; wedge shaped shoulder portions filth whose inner i'ares slope downwardly and inward i and merge into the ohliquely dinposed actingz inner faces Etl of the teeth. l laeh tooth presents its lower or packing: 'i ace 3 at an abrupt angle to the packer liar 26, and these pecking. laces, in euniunetion, present: a stepped lornnition, the teeth, however, heing entirety separated from one another by intermei'liale portions oi the packer hair. The packer litli. merges into and terminates with the lowermost teeth, the lower or packing face of which is unbroken hy a further extension oi the her.

Each bar is provided on its inner face with a longitudinally extending centrally disposed spline or rih 82 which serves the double function of reinforcing the hit and also serving to divert the pulverulent 1naterial laterally onto the sloping; inner faces of the teeth. It is preferred to make each packer har with its quota oil teeth of (It st or integral formation, and the i'liruensit'ins of the teeth are such that the parking); taee of each tooth will present an area sulist antially equal to one half oi? the cross se tional area of the spent so that when oppositely facing teeth are hrought into juxtaposed position; the lower inner edges oi? the teeth will. lie in close relation to on auotiheix only sullicient. cl arane hein r all'orded to permit:

the packer liars to reci n'ocate without inter lerenee.

The spout with its pacltcr liars cooperates with a l latci'orm 533 which is mounted upon a plunger rod thi uttered through. a tahle 35, which all'ords a working: space tor the operator and is prelerihlv located ahout three tect l'roi'n the floor. The lower end of the plunger ill is secured to a sliding cross liar ".lti the ends oi which are provided with sleeves Iii slidahly mounted upon a pair oi vertical guide rails Iltl which extend ljictwrcn the base l1 and the tahle V The arrangeinent is such that as the sliding cross lltli 36 is titled it: will project the plat term 3-) npwardl toward the mouth ot the spout to tiring the empt ha r into cooperative relation to the spout at the liieginning of the titling operation.

Means a e provided for yieldahly supporting the platform in elevated relation, so that the platform will he progressively depressed in" the pressure of the accumulating charge oi? material downtlmving into the hag or receptacle. 57inch means will now he described.

'lhe sliding cross ha r 36 has secured thereto a length of chain or :ahle ill), the uppc' end oi' which is secured by a clip ll) to the rim oi the sprocket wheel ell keyed to a. weight shaft 452. The shaft also has keyed thereto a siualler sprocket rill which meshes with a. weight chain -i- :arryimr a weight at to outer or free end. The opposite end oi the weight chain is secured to a. crank arm ill mounted upon the end oi a rock sha l't 4. L which shactt. at its :lorward end, is provided with an inwardly extending tool; treadle ill. in de n'e:-r.--.u1;r the toot, treadle the rock shaft is rotated to bring the crank arm it into downwardly. extending rclatioin which imparts a down pull to the lower end oi? the weight chain and thereupon ele ates the weight and com-urrcnlly rotates the weigthtshal't lil with the large sprocket all mounted thereon. This slaclcnis the depending end of thechain ill) and allows a lowerins; hy gravity of the sliding cross liar 3e and serves to lower the hag; carrying plat- :torm Iii).

ll hen the trcadle is released the plat form will automatically rise toward the spout and when down pressure is exerted by the charge o't material flowing into the bag the plat. form will he progressively depressed against the pressure attorded by the weight until the hair has been completely tilled.

The gear zuwmgrelnent is one wherehy a relatively slight movement oi? the weight will control a relatively {L'Ytlttltfl' movement oi the plati'orm, which is dcsi 'ahle in the rap'd and uniform operation of the machine.

it dcsir: hie to provide means tor stopping: the :i'eeding operations of the packer liars as soon as the hag: has heen tilledto the desired height, and such means will now he tittltlllltltl.

lnnuedlatcly in front of the plunger rod 34: is located a swinging l'rame liar ll) which is hinged. at. its towel-end. to a pin 5!) in such a way as to permit limited swinging movement; oi? the upper end oi the her. lhe swinging: har is provided with an elongated slot 5i (see Fig. l.) whirl atlords a Quiche way For an adjusting" hloch 5:2 carrying.- a cam hire 5? on its rear aide. The hloch llttt entered llitl'lllllttllflll an ad ii stin screw i: which is rotatably mounted in upper and lower hearing hloctts {iii and Pith and the screw is provided a" its upper end with a l and wheel 5? preterahly located ahore the sur'l'are of the tiahle 35. so that the operator, h turning the hand wheel 5?, may regulate the vertical position of the hlocl: 52 with the cam 53 carried thereby.

lit

position by the action of a coil spring 59 which encircles the rod 60 extending forward from the upper end of the swinging bar and through a bracket 61 against which the outer end of the spring contacts.

The swinging bar is provided, near its upper end, with an inwardly eatending latch tooth 62 having an abrupt upper face which is adapted, when the swinging bar is thrust inwardly, to underlie the end of a lever arm 63 which is pivoted near its center to a bracket 64, and is provided at its outerend with an enlarged head 65 which embraces a clutch operating rod ('56 adapted to control the movements of the clutch 2i.

The inner end of the lever 63 is adapted, at the proper time, to be lifted by the contact of a stop lug 67 carried by the plunger rod 34, the arrangement being such that when the plunger has been moved upwardly by the weight to the required distance to bring the mouth of the bag around the lower end of the chute 16 the lug 67 will engage with the under edge of the inner end of the lever 63 and lift the same, thereby depressing the outer end of the lever and causing the lever head 65 to engage with a collar 68 on the clutch rod 66 which draws down the clutch rod against the tension of a spring 69, thereby engaging the clutch and initiating the rotation of the crank shaft 21.

There-upon the packer bars will begin to work in feeding and packing down the 1naterial into the bag, which will cause the platform and plunger 3a to be lowered against the action of the weight.

The lifting of the inner end of the lever 63 by the lug 67 will cause the inner end of the lever to be engaged by the latch lug 62,

which then will spring inwardly so that the inner end of the lever will be held elevated during the time required to fill the bag to the desired degree, but as soon as the plunger rod has been depressed sufiiciently to bring the boss 58 into engagement with the cam 53, a further lowering of the plunger Set will cause an outswinging of the bar 49, which carries the latch tooth 62 away from theelever 63, thereby releasing the lever, and allowing the clutch rod to. rise under spring tension, which disengages the clutch and suspends the operation of'the packers. The clutch is so arranged that the packing operation will come to a halt with the packer teeth in opposed relation to one an other, so that the spout will be closed against further discharge of material. 'l hereafter the platform can be additionally depressed by pressing down on the foot treadle as in Fig. 1, which further elevates theweight and permits the platform and associated parts to descend by gravity. lVith the plat form in its lowermost position, the bag with its contents can bereadily removed and an empty bag positioned.

By adjusting the position of the cam 53, the clutch can be thrown out at any desired point during the descent of the platform, which permits the operator to adjust the device to bags of varying depth or capacity.

The formation of the packer bars is such as to afford to the lower or packing surfaces of the teeth a maximum pac-king'surface, which attained by laterally extending the teeth beyond the edges of the connecting packerbar and carrying the sloping inner surfaces of the teeth back to. the plane of the rear surfaces of the bars. This brings the wedge shaped shoulders 29 into direct contact with the frontand rear walls of the spent, so that they will serve to scrape off and inwardly divert any of the pulverulent material which may tend to adhere to the walls of the spout. The arrangement of the teeth, furthermore, is better adapted to afford the necessary agitation than that'afforded by the teeth of the formation shown in my Patent No. 1,487,683 Furthermore, the separation of the teeth one from the other avoids the provision of sharp inner angles or corners beneath the teeth into which the pulverulent material may tend to lodge and pack, and by proportioning the teeth in such av way that each tooth will present its majoiv dimension from side to side of the chute the dimensions of the teeth from back to front may be correspondingly lessened with out reducing the packing area, which constitutes a more desirable arrangement than one in which the depth of the teeth is greater, since relatively shallow teeth tend better to divert and direct the material down through the center of the spent.

The machine as whole is one which enables the bags to be rapidly, evenly and uniformly filled and packed and the filled bags to be removed and replaced by empty bags in a speedy and efficient manner: and the arrangement for stopping the operation of the packers at a predeterinined point insures uniform filling and prevents any waste of material due to a dribbling from the spout after the bag has been filled to the desired point, since the packer teeth, when in opposed relation, serve the purpose and function of a valve closure toprevent further discharge of the material.

Although thefmachine has been described till intnlili talioi a in structure may be made with out departing; from the spirit of the inrcntion.

I claim:

1. In a, machine for 'lccdine and packi 5 pulrerulcnt material, the coinbimition of a. spout, a packer bar within the spout, said packer bar having); downwardly projecting teeth in separated relation to one another, an opposing member having similarly ponitioncd downwardl i projecting teeth. and means for reciprocatlug the packer bar, the edges of the o iposcd teeth lying; in close relation to one anolhcr when in the medial position, substantially as de cribed.

53. In a machine for feeding and packing pulrcrulcnt material, the combination of a spout. a packer bar within the. spout, said packer bar hating downwart ly projecting tcet h in separated relation to one another. an

opposing member having: similarly positinned downwardly projecting teeth. and means for reciprocating the packer l. ar. the edges of the opposed tectili lying: in close relation to one another when in the medial .posriition, and the teeth of one of said coopcrating); members being; conlignred to project; laterally box ond the edges of said member. substantially as d nicribed.

3. In a ma hine for feeding and packing; pnlverulent material, a packer bar provided with a pin 'ali t v of downwardly pri'ijeeting wedge shaped teeth each affording an abrupt packing face and a sloping feeding: face, the teeth projecting laterally beyond one edge of the packer bar. substantially as described.

11:. In a machine for feeding and packinp, pulverulent materiah a packer bar provided with a plurality of downwardly projecting wedge shaped teeth each affording an abrupt packing face and a sloping: feeding face. the teeth projecting}; laterally beyond one edge of the packer bar, and the feeding; tam sloping upwardly and rcarwardly to a knife edge, subs;l1a11tially as described.

In a machine for feeding and packing pulvcrulent material, a packer bar provided with a plurt lily of downwardly projecting: wedge shaped tccth each a llording an abrupt; packing face and a sloping); feeding; face. the teeth projecting late ally beyond one edge of the pa :kcr bar. and the feeding: l'ace shaping: upwardly and rcm'wardl to a knife ede'c lying: flush with the rear face oi? the packer bar. HllllStzllltiillb' as described.

(3. In a machine for feeding and packinc' pulverulcnti material. a packer bar provided with a plurality of downwardly pririectinnwedge shaped teeth each aliordiiiip' an abrupt packing; face and a sloping feeding;- face, the teeth projecting laterally beyond one edge of the packer bar the individual teeth being separated from one another, substantially as described.

T. In a machine for feeding and packing pulvcrulcnt material. a packer bar provided with a plu 'alit v of downwardly projecting wedge shaped teeth each all'ording an abrupt packing face and a sloping: feeding face, toe teeth projection; laterally beyond one edge, ol the packer bar and the [ccdinp face slopil'ip' upwardly and rcarwardly to a knife edge the individual tccth being sepa'at'ed from one another. substantially s described.

In a machine for feeding and packing pulrerulent matcriaba packer bar provided with a plurz lity of downwardly projecting wedge shaped teeth each affording an abrupt pal-Linc; face and a sloping: feeding face, the. teeth projecting laterally beyond one cdit'c of thc packer bar, and the feeding face nloping upwardly and rcarwardly to a knife cdeje lying lluah with the r-sar face of the packer bar. the individual teeth being separated from one another, substantially as described.

J. In a machine for feeding and packing pulrerulent material, a packer bar provided with a plurality of downwardly projecting wedge shaped teeth each affording; an abrupt packing face and a sloping feeding face, the teeth projecting laterally beyond one edge of the packer bar, the individual teeth beingseparated from one another. and a rib ex tending inwardly from the inner face of the packer bar and between the separated teeth, substantially as described.

10. In a machine for feeding and packing: pnlverulcnt materiah a packer bar provided with a pin ality ol downwardly projecting wedge shaped teeth each affording an abrupt packing face and a sloping feeding face, the teeth projecting late ally beyond the edge of the packer ban and the feeding face sloping upwardly and rnirwardly to a knife edge, the irnliridual teeth being sepa'ated from one another, and a, rib extending inwardly from the inner face of the packer bar and between the separated teeth. substantially as described.

ll. In a machine for feeding and packing pulverulent material, a packer bar provided with a plurality of downwardly projecting wedge shaped teeth each a ll'rn'diu r an abrupt packing face and a aloping feeding face. the teeth project lug laterally beyond one edgi e of the packer bar. and the lecdinpface slo 'iing upwardly and l'tlllWVill'lll V to a knife cd re ying llush with the rear face olf the packer bar, the individual teeth being acparated from one another, and a rib extending inwardly from the inner face of the packer bar and between the separated teeth subctantiallj as described.

12. In a machine for Feeding and packinp; pulverulent material. the combination of a spout configured to receive the o 3811 end of a sacle a packing member within the spent, a shaft and connections for impart lilo lac

relatively large sprocket wheel mounted on,

the weight shaft, and a sprocket chain connected at one end to the larger sprocket wheel and at its other end to the platform substantially as described.

13. In a machine for feeding and packing pulverulent material, the combination of a spout configured to receive the open end of a sack, a packing member within the spout, a shaft and connections for imparting packing movements to the packing member, a constantly rotating driving member, a clutch for imparting rotation from said driving member to the shaft, a vertically movable platform beneath the spout, means operated by the vertical movements of said platform for automatically throwing said clutch into and out of clutching relation, a weight tending to lift the platform toward the spout a flexible connection to the outer end of which said weight is secured, a relatively small wheel over which said flexible connection is carried, a weight shaft upon which said Wheel is mounted, a relatively large sprocket wheel mounted on the weight shaft, a fiexible connection connected at one end to'the larger wheel and at its other end to the platform, andmeans controlled by the operator for drawing on the end 'of the weight connection opposite to; the weight to lift the weight and permit the platform to descend by gravity, substantially as described.

14. In a machine for feeding and packing pulverulent material, the combination of a spout configured to receive the open end of a sack, a packing member within the spout, a shaft and connections for lmpartmg packing movements to the packing member, ,a constantly rotating driving member, a clutch for imparting rotation from said driving member to the shaft, a vertically movable platform beneath the spout, means operated by the vertical movements ofsaid platform for automatically throwing said clutch into and out of clutching relation, a weight tending to lift the platform toward the spout, a sprocket chain to the outer end of which said weight is secured, a relatively small sprocket wheel over which said sprocket chain is carried, a weight shaft upon which said sprocket wheel is mounted, a relatively large sprocket wheel mounted on the weight shaft, a sprocket chain connected at one end to the larger sprocket wheel and at its other end to the platform, and a foot treadle and connections for imparting a tension to the weight chain to lift the weight and permit the platform to descend by gravity, substantially as described.

15. In a machine for feedin and packing pulverulent' material, the coni bination of a spout configured to receive the open end of a sack, a packing member within the spout, a shaft and connections for imparting packing movements to the packing member, a constantly rotating driving member, a clutch for imparting rotation from said driving member to the shaft, a vertically movable platform beneath the spout, means operated by the vertical movements of said platform for automatically throwing said clutch into and out of clutching relation, a weight tending to lift the platform toward the spout, a flexible connection to the outer end of which said weight is secured, a relatively small wheel over which said flexible connection is carried, a weight shaft upon which said wheel is mounted, a relatively large wheel mounted on the weight shaft in fixed relation to the small wheel, a flexible connection secured at one end to the larger wheel and at its otherend to the platform, and means for drawing on the weight connection to lift the weight and turn the wheels for lowering the platform, substantially de scribed.

EsLI A. MARSH. 

